<div class="tutorial-summary" data-metadata-json='{"programKind": "per-method", "difficulty": "medium", "groupedProjectAssets": [{"name": "Space aliens", "assets": ["Invader_Navy_1.png", "Invader_Navy_2.png", "Invader_Green_1.png", "Invader_Green_2.png", "Invader_DarkRed_1.png", "Invader_DarkRed_2.png", "Invader_Blue_1.png", "Invader_Blue_2.png", "Invader_Cyan_1.png", "Invader_Cyan_2.png", "Invader_Orange_1.png", "Invader_Orange_2.png", "Invader_Pink_1.png", "Invader_Pink_2.png", "Invader_Red_1.png", "Invader_Red_2.png", "Invader_Yellow_1.png", "Invader_Yellow_2.png"]}, {"name": "Explosion frames", "assets": ["Explosion_1.png", "Explosion_2.png", "Explosion_3.png", "Explosion_4.png", "Explosion_5.png"]}]}'><p class="image-container"><img alt="Screenshot" src="screenshot.png"/></p>
<h1>Blue Invaders</h1>
<p>In this game we'll defend ourselves from dangerous blue invaders, by
clicking on them.  But don't destroy the friendly green aliens by
mistake!</p></div>